Lite Master Test Fixture Build
The test fixture consists of:
- Electronic assembly and harness
- AC power cord
- 8 each, modular plugs
- USB cable
Electronic assembly and harness
The electronic assembly includes a few electronic components on a prototype board, wired to 2 terminal blocks, a connector, and 2 terminals.
See the schematic, below, for how to wire it.
Mark the 2 LEDs that go to the OK outputs, to help during testing.
- C1 1000 uF / 16 V electrolytic capacitor, radial
- D1 1N4004 1 A 400 V diode, axial (or equivalent)
DS1 10 LED bar, DIP-20 (such as LiteOn LTA-1000G)
- J1 5 x C-Grid SL, Female housing, Connector (Molex 50-57-9405)
- K1 5 V, 1 kOhm coil, SPDT relay, PCB thru hole (such as Aromat TF2E-5)
- R1 10 Ohm, 1/4 W, resistor, axial
- RN1-2 5 x 1 kOhm resistor network, common, SIP-6
- T1-2, #10 stud, 24 AWG crimp uninsulated, ring terminal (such as 3M MN24-10RK)
- T3-7, C-Grid SL socket, 22-24 AWG crimp gold, Connector (Molex 16-02-0103)
- TB1-2 12 x 3.5 mm, 2 piece pluggable terminal block (Phoenix Contact 1984112)
- Prototype perboard PCB, pad per hole
- Assorted 24 AWG hook-up wires
AC power cord
- Cut off the female end from a standard AC power cord
- Unclad 1"
- Cut off the ground wire (usually green / yellow)
- Strip the other 2 wires
- Install the 2 wires in the 1st and last location of the screw terminal block
- AC power cord, cut off the female end
4 x .2", 2-PC plug, parallel entry, Connector, Barrier Block (OnShore Technology OSTTJ045153)
These plugs have pins 2 and 4 shorted together, as well as pins 6 and 8. Route the wire to short those pins (looking at the contacts, facing down,
- the 1st wire goes in the left most position and the 3rd position
- the 2nd wire goes in the 5th position and the 7th position
BOM (each of 8 plugs)
- RJ45, 8-8 modular connector
- 2 each, 26 AWG hook-up wire, 1.5" long
Standard USB cable (not mini, not micro).